Finding the Third Proportional to 143,926 and 215,905

Step by Step Solution

1. Step 1: Write the proportion equation
   143,926 : 215,905 = 215,905 : x
2. Step 2: Convert to fraction form
   143,926/215,905 = 215,905/x
3. Step 3: Cross multiply
   143,926x = 215,905 × 215,905
4. Step 4: Simplify right side
   143,926x = 46,614,969,025
5. Step 5: Solve for x
   x = 46,614,969,025/143,926
6. Step 6: Final answer
   x = 323,881.50